On Tue, Oct 12 2021 at 18:10, Borislav Petkov wrote:
> On Tue, Oct 12, 2021 at 02:00:11AM +0200, Thomas Gleixner wrote:
>> CLONE_THREAD does not have the guarantee of a true fork to inherit all
>> state. Especially the FPU state is meaningless for CLONE_THREAD.
>>
>> Just wipe out the minimal required state so restore on return to user space
>> let's the thread start with a clean FPU.
>
> This sentence reads weird, needs massaging.
The patch is wrong and needs to be removed. I just double checked
pthread_create() again and it says:
The new thread inherits the calling thread's floating-point environment
(fenv(3))
No idea where I was looking at a few days ago. :(
Thanks,
tglx
